Combined strainer and sump



Feb. 5, 1946. L, A ms H 2,394,076

COMBINED STRAINER AND SUMP Filed Jan. 25, 1944 2 Sheets-Sheet 1 L-@' F i IN VENT OR.

14.2LSCZ/ V ATTORNEY Y.

Feb. 5, 1 946. k

. 1.. A. KISCH 2 394 076 COMBINED STRAINER AND SUMP 2 Sheets-Sheet 2 Filed Jan. 25, 1944 ATTORNEY.

Patented Feb. s, 1946 2,394,076 COMBINED s'ranmaa AND SUMP Ilouis A. Kisch, Little Falls, N. J., assignor to Metal Textile Corporation, West Orange, N. J a corporation of Delaware Application January 25, 1944, Serial No. 519,608

2 Claims. (01. 210-484) This invention relates to improvements in strainer means for separating suspended solids from liquid passed therethrough, whereby to clarify and cleanse the liquid for initial Or repeated use.

The present invention has for an object to provide a novel combined strainer and sump, whereby a segregated quantity of clean liquid, free of undesired suspended solids, may be provided subject to withdrawal by suitable means, such as a pump,

for delivery to a desired place of use; as e. g. for

service in liquid circulating apparatus employed in connection with machine tools adapted to serve cooling, lubricating or other treating liquid to an operating tool and the material worked thereby, so that the liquid thus circulated may be free of anyaceumulation of lint. chips, dirt or other foreign substances or particles carriedback with the liquid from the operating tool into the liquid supply reservoir with which the combined strainer and sump is associated.

The invention has for another object to provide an upwardly open clean liquid sump or collection chamber having at least one and preferably a plurality ofexternally related strainer devices coupled thereto for communicati n with the interior thereof, said sump or collection chamber being adapted to be disposed within the interior of a liquid reservoir. with its open top above the liquid level of the latter, but wi h the coop rating strainer device or devices submerged within the liquid content of said reservoir. w ereby liquid capacity, whereby to del ver into and maintain within the sump, subject to pump discharge, a substan ial head of clean liquid.

The invention ha for a further object to provide, in combination with a sump or c llection chamber, intake means leading into the lower portion thereof, said intake means terminating in a strainer support for mounting bag-like strainer means of liquid pervious material, with the interior of the latter in communication with said intake means; said bag-l ke strainer means being expanded by inserted open-work frame means having rim means around which marginal mouth portions of the strainer bag means may be folded, and sealingly abutted upon the support; and said bag-like strainer means being detachably secured to said support by manipulatable clamp hooks.

Other objects of this inventiomnot at this time more particularly enumerated, will be'understood from the following detailed description of the same. I

An illustrative embodiment of this invention is shown in the accompanying drawings, in which:

Fig. 1 is a vertical sectional view of the combined strainer and sump according to this invention as disposed within the content of a liquid supply reservoir, one of the strainer members being shown in elevation; this view also showing a liquid discharge pump, of the immersion type, as operatively supported in connectionwith th sump.

Fig. 2 is a top plan view of'the combined strainer and sump; thi view also showing the liquid discharge pump as operatively supported in connection with the sump.

Fig.3 is a fragmentary elevational view of the wall H, the same being open at its top end, thus providing an upwardly open chamber l2 adapted to receive strained liquid through associated strainer means to be presently described. Said sump or collecting chamber is adapted to be disposed within the interior of a supply reservoir l3 containing a liquid desired to be strained and cleaned. The sump or collecting chamber is so dimensioned as to height. or so supported, thatits major portion is submerged in the liquid content of said supply reservoir l3, but with its open top end projecting above the level of said liquid content. Said sump or collecting chamber may beef any suitable shape in horizontal cross-section, but

for maximum capacity is preferably of rectangular cross-sectional shape.

Afilxed to the sump or collecting chamber, to

4 provided with means for detachably supporting liquid strainer means in communication therewith. The intake and strainer means may comprise one or more units, but, in order to obtain a maximum of straining capacity, it is preferable to In preferred form, as shown, each intake and strainer means comprises a conduit means I of elbow form affixed to a side wall it of the sump or collecting chamber, adjacent to the bottom of the latter, and so as to communicate with the interior chamber l3 thereof. Amxed to the outer end of the conduit means I4 is a The strainer means,

supporting plate IS with its mouth end abutted against the latter, thus connecting its interior in communication with said sump intake means l4.

The strainer means per se comprises a baglike member l6. Said strainer bag member may be selectively made of various materials adapted 1 to provide the necessary liquid pervious interstitial structure suitable for liquid straining effect. The strainer bag member I6 is expanded by-means of an open-work frame which is inserted therein. Said frame, in one illustrative form thereof as shown, comprises a series of transverse U-shaped body members I'I made of strong and rigid material, such as metallic wire or rod stock. Said U-shaped members H are 1 spaced apart in the direction of the width of the strainer bag member to be served thereby, and to the terminals of their legs is joined a rim member l8 which defines the open or mouth end of the frame. The lower or closed ends of the U-shaped body members It are secured together against relative displacement by a trans 1 verse tie-rod l9 which extends across said ends.

23. Marginal portions of the supporting plate I 5, preferably at points adjacent therespective ends of the latter and'thus adjacent to the respective lateral ends of the bag member mouth portion seated thereon, are provided with through openings 24, through which the shanks 23 of the hook-like clamp elements 22 are passed for downward projection beneath the under side of the supportin plate I5. Engaged on the thus downwardly projecting shanks 23 are thumb-nuts 25, which bear against said under side of the supporting plate [5. To apply the hook-like clamp elements 22 to the frame expanded strainer bag member, the thumb-nuts 25 are loosened to allow said elements 22 to be engaged over the rim member supported mouth end of the bag member, whereupon said elements 22 are pressed inwardly so that their hook extremities 23 may grip and draw down the rim member supported month end ofthe bag member a'gainst the supporting plate l5, when the thumb-nuts 25 are screwed home against the under side .of the latter. When,v

the rim supported mouth end of the bag member is thrust down upon thesupporting plate It, not only will the bag member be firmly secured or anchored in operative assembled relation to the latter, but the seating and sealing lip portion 2| of the bag member will be compressed, whereby to form atight union or joint between the bag member and supporting plate, so that no gaps are permitted between these parts which would be likely to permit inflow of unstrained '-liquid into the strainer bag interior, and thus The described elements of the frame are preferably joined together by welding, thus providing a very strong and rigid frame structure. The

1 frame thus provided is of somewhat less length 1 than the length of the strainer bag member l6 to be served thereby.

In use, a frame structure is inserted through i the open mouth of the strainer bag member, to

extend through the bag member interior to the closed end thereof. The strainer bag member 1 being of somewhat greater length than the length of the frame, when the latter is inserted within the bag member, a marginal portion 20 of the mouth end of the bag member will project exteriorly beyond the frame rim member l8. Such projecting marginal portion 20 of the mouth end of the bag member is turned inwardly and folded over and around the frame rim member l8, and

is tucked into the bag member interior. By rea. son of this arrangement, not only is the strainer l8,-whereby to provide an unyieldingly backed but compressible seating and sealing lip portion 1 2| at the mouth end of the bag member for operative abutment against the top side of the supporting plate IS, with said mouth end in communication with the passage of the conduit into the clean fluid collecting chamber 13 of the sump. It' will be obvious that, upon releasing the clamp-hook elements 22, the strainer bag member l6. may be quickly and easily dismounted and removed for cleansing and replacement.

In operation, fluid desired to be strained, be! fore withdrawal thereof from the supply reservoir i3, passes through the pervious walls of the strainer bag member or members I6 into the interior thereof, so that solids suspended in said fluid are excluded, and only strained clean fluid enters the bag member or members. The strained clean ,fluid passes from a bag member interior through the associated intake means 14 into the collecting chamber l2 of the sump i3--ll, thus tfilggg the latter with a substantial head of clean The clean fluid may be withdrawn from the sump by pumping the same therefrom for delivery to a desired place of use.

lecting chamber l2 an immersion type pump, especially an electric motor driven -immersi0n type pump, such e. g. as the coolant pump manufactured and sold under the trade name GilbarcoCE coolant pump. A pump of this general type is shown in the drawings, and comprises a rotary pump body 30 having an upstanding hollow or ,tubular pedestal 3|, at theupper end oi which is supported the pump driving motor 32. Said pedestal 3| is provided with fluid intake ports 33 which communicate through the pedestal interior with the pump intake. Connected with the pump discharge portion 34 is an up-.

means l4 leading into the sump or collecting chamber.

To detachably connect the frame expanded strainer bag member with the supporting plate l5 in the described relation to the latter, manipulatable coupling clamp means is provided.

j Said coupling clamp means comprises hook-like clamp elements 22 having screw-threaded shanks The sump is especially well adapted to receive within its coland so as to be immerse'd in the clean liquid content thereof, whereby the pedestal rises through the interior of the collecting chamber l2 to project upwardly through the upper open end of the latter, thereby to dispose the motor 32 above and exteriorly of the sump and supply reservoir l3 and their liquid content. The discharge conduit 35 likewise rises through the interior of the collecting chamber I2 of the sump, so as to extend exteriorly from the latter. In. many cases, the support of the pump structure by the legs or foot pieces 36 will be adequate, but for a more stable support, a hanger spider 31 may be afiixed to and around the upper end of the pedestal 3i, substantially in the plane of the open top end of the sump, and said hanger spider I1 is provided with radiating arms 38 to extend over and rest upon the top edges of the sump side walls Ill. Preferably said arms J8 terminate in angular lugs 39 to overhang and abut the exterior faces of the sump side walls Ill, whereby to prevent lateral shifting and displacement of the hanger spider and the pump unit supported thereby. It willbe understood. that the pump structure may be optionally supported in operative assembled relation to the sump by either the legs or foot pieces 36 alone, or by the hanger spider 3'! alone, or both 01' these supporting means may be utilized together if desired.

It will be obvious that the sump provides a means of generous capacity to collect and conasos,

be strained. saidv strainer bag means having mouth portions abutting the supporting plate means, frame means within the strainer baa means for supporting and expanding the latter, end portions of the supporting plate means extending beyond adjacent mouth portions of the strainer bag means, releasable clamp hook means I mounted onsaid end portions of the supporting plate means to grip adjacent mouth portions of the expanded strainer'bag means, whereby to clamp said bag means to said plate means in lar elbow means affixed to the chamber wall adjacent the chamber bottom so as to communie cate with-the chamber interior, fiat transverse tain a considerable quantityof strained clean fluid, and so as to provide asubstantial head of clean fluid against which the pump may draw.-

Having now described my invention, 1 claim:

supporting plate means afllxed to and across the elbow means and through which the latter extends, liquid pervious strainer bag means submerged in the liquid to be strained, said strainer bag means having mouth portions abutting the supporting plate means, frame means within the strainer bag means for supporting and expanding the lattenend portions of the supporting plate 1. Strainer apparatus comprising an upwardly.

open strained liquid receiving chamber adapted to be submerged in liquid to be strained with its open top above the level oi! the latter, externally projecting up-turned tubular elbow means affixed to the chamber wall adjacent the chamber bottom so as to communicate with the chamber interior, flat transverse supporting plate means 7 afllxed to and across the elbow means and through which the latter extends, liquid pervious strainer bag means submerged in the liquid to means extending beyond adjacent mouthpor-.

tionsof the strainer bag means, and releasable clamp hook means mounted onsaid end portions of the supporting plate means to grip adjacent mouth portions of the expanded strainer has 40 means, whereby to clamp said has means to said plate means in upstanding relation thereto exteriorly 01' and adjacent to the chamber wall and with the interior of said bag means in communication with said elbow means.

ours a. 

